DE8513976U1 - Oxygen probe using a non-conductive ceramic tube - Google Patents
Oxygen probe using a non-conductive ceramic tubeInfo
- Publication number
- DE8513976U1 DE8513976U1 DE19858513976 DE8513976U DE8513976U1 DE 8513976 U1 DE8513976 U1 DE 8513976U1 DE 19858513976 DE19858513976 DE 19858513976 DE 8513976 U DE8513976 U DE 8513976U DE 8513976 U1 DE8513976 U1 DE 8513976U1
- Authority
- DE
- Germany
- Prior art keywords
- conductive ceramic
- rod
- tube
- reference electrode
- oxygen
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000001301 oxygen Substances 0.000 title claims description 12
- 229910052760 oxygen Inorganic materials 0.000 title claims description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims description 9
- 239000000523 sample Substances 0.000 title claims description 7
- 239000000919 ceramic Substances 0.000 title claims description 6
- 239000007784 solid electrolyte Substances 0.000 claims description 6
- 239000000156 glass melt Substances 0.000 claims description 4
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 3
- -1 oxygen ions Chemical class 0.000 claims description 3
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 5
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000006060 molten glass Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/403—Cells and electrode assemblies
- G01N27/406—Cells and probes with solid electrolytes
- G01N27/411—Cells and probes with solid electrolytes for investigating or analysing of liquid metals
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Molecular Biology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Measuring Oxygen Concentration In Cells (AREA)
Description
• *• *
ti 13 -' ' ti 1 3 - ''
Die Neuerung betrifft eine verbesserte Bezugselektrode für eine Meßkette zur Messung des Sauerstoffpartialdrücks in aggressiven Medien, insbesondere Glasschmelzen.The innovation concerns an improved reference electrode for a measuring chain for measuring the oxygen partial pressure in aggressive media, especially glass melts.
Aus der DE-OS 31 09 454 ist eine Sonde zur Messung von Sauerstoffpartialdrücken bekannt, deren einfachste AusfUhrung darin besteht, daß ein als Kontaktelement zwischen der Innenableitung und der Glasschmelze dienender Stab aus einem sauerstöffionenleitenden Festelektrolyt, vorzugsweise ZrO2, in das aggressive Medium eintaucht.From DE-OS 31 09 454 a probe for measuring oxygen partial pressures is known, the simplest version of which is that a rod serving as a contact element between the inner discharge and the glass melt and made of an oxygen ion-conducting solid electrolyte, preferably ZrO 2 , is immersed in the aggressive medium.
Weitere aus der DE-OS 31 09 454 bekannte Bezugselektroden bestehen entweder aus einem einseitig geschlossenen Rohr aus dem sauerstöffionenleitenden Festelektrolyt, oder aus einem Metallrohr mit einem angesinterten ZrOo-Boden.Further from DE-OS 31 09 454 known reference electrodes consist either of a tube closed on one side made of the oxygen ion-conducting solid electrolyte, or of a Metal tube with a sintered ZrOo base.
Diese bekannten Bezugselektroden haben alle den Nachteil, daß sich die ZrOp-Sonde in der Glasschmelze zu schnell auflöst und/oder daß die Sonde bei Temperaturschocks zu leicht bricht, was angesichts der hohen Kosten für ZrO« von großer wirtschaftlicher Bedeutung ist.These known reference electrodes all have the disadvantage that the ZrOp probe dissolves too quickly in the glass melt and / or that the probe closes in the event of temperature shocks breaks easily, which is of great economic importance in view of the high costs for ZrO.
Ziel der vorliegenden Neuerung ist eine Bezugselektrode, die mechanisch stabil ist, leicht auszuwechseln ist und insbesondere preiswerter ist als die herkömmlichen Sonden. Dieses Ziel wird mit einer Bezugselektrode gemäß den Schutzansprüchen erreicht.The aim of the present innovation is a reference electrode that is mechanically stable, easy to replace and in particular is cheaper than the conventional probes. This goal is achieved with a reference electrode according to the protection claims achieved.
Die neue Sonde besteht aus einem Stab aus einem sauerstoffionenleitenden Festelektrolyt, der in ein Rohr aus einer nichtleitenden Keramik eingehängt ist, wobei er mittels eines Bolzens, der durch zwei Bohrungen in diesem Rohr und durch eine Bohrung im oberen Teil dieses Stabes reicht, im unteren Abschnitt dieses Rohres gehalten wird.The new probe consists of a rod made of a tube that conducts oxygen ions Solid electrolyte, which is suspended in a tube made of a non-conductive ceramic, whereby he means a bolt that extends through two holes in this tube and through a hole in the upper part of this rod, in the lower section of this tube is held.
Das bevorzugte Material für diesen Stab ist Zirkondioxid (JrO2), das gegebenenfalls zur Verbesserung der Sauerstoffionenleitfähigkeit mit einem anderen, gilt sauerstoff ionenleitenden Metalloxid dotiert sein kann, und das bevorzugte Material für das Rohr ist Aluminiumoxid (Al2O3). Auch der Bolzen besteht vorzusweise aus Al0O0.The preferred material for this rod is zirconium dioxide (JrO 2 ), which can optionally be doped with another oxygen ion-conductive metal oxide to improve the oxygen ion conductivity, and the preferred material for the tube is aluminum oxide (Al 2 O 3 ). The bolt is also preferably made of Al 0 O 0 .
Dieser Zr0o-Stab ist zwar relativ dicht in das AlgO^-Rohr
eingepaßt, aber nicht so dicht, wie dies z.B. durch Sintern erreicht wird. Dies ist auch gar nicht notwendig, weil durch
einen geringen Überdruck des Referenzgases innerhalb des
( > Al203~Rohres eine Eindiffusion von Bestandteilen der Schmelze,
die die Innenableitung der Bezugselektrode vergiften könnte, verhindert wird. Der Vorteil der erfindungsgemäßen
Bezugselektrode liegt darin, daß die schwierig zu erreichende Abdichtung der Bezugselektrode an dieser Stelle
umgangen wird. Ein weiterer Vorteil liegt in dem wesentlich geringeren Preis, der aufgrund der Wiederverwendbarkeit des
AKOg-Rohres und der mindestens 10- bis 20fachen Lebensdauer
des ZrOp-Stabes um ein Vielfaches niedriger liegt als bei den bekannten Anordnungen (z.B. ZrOg-Rohr).This Zr0 o rod is fitted relatively tightly into the AlgO ^ tube, but not as tightly as is achieved, for example, by sintering. This is also not necessary at all because a slight overpressure of the reference gas within the
( > Al 2 0 3 ~ pipe prevents the diffusion of constituents of the melt that could poison the inner discharge of the reference electrode. The advantage of the reference electrode according to the invention is that the difficult to achieve sealing of the reference electrode at this point is bypassed The advantage lies in the significantly lower price, which is many times lower than with the known arrangements (e.g. ZrOg tube) due to the reusability of the AKOg tube and the at least 10 to 20 times longer service life of the ZrOp rod.
Der Gegenstand der Neuerung wird nachfolgend anhand der beiden Figuren näher erläutert.The subject of the innovation is explained in more detail below with reference to the two figures.
In der Fig. la ist eine erfindungsgemäß? Bezugselektrode einer Meßkette dargestellt. In einem Rohr 3 aus nichtleitender Keramik ist ein in die Glasschmelze 10 eintauchender Stab 1 aus sauerstoff! onenleitendem Festelektrolyt (ZrO2) mittels eines Bolzens 2 gehaltert. Auf die obere Stirnfläche des Stabes 1 ist die aus Platin bestehende Innenabteilung 5 der Bezugselektrode aufgesetzt wobei zur besseren Kontaktierung ZrO2~Pulver 4 dient.In Fig. La is an inventive? Reference electrode of an electrode shown. In a tube 3 made of non-conductive ceramic there is a rod 1 made of oxygen which is immersed in the molten glass 10! onenconducting solid electrolyte (ZrO 2 ) held by means of a bolt 2. The inner compartment 5 of the reference electrode, which consists of platinum, is placed on the upper end face of the rod 1, with ZrO 2 powder 4 being used for better contacting.
* · ·
• # · t · ■•. · <·
* · ·
• # · t · ■
• t
• · 1* · 4
• t
• · 1
•
*. ri « * «M»
•
*. ri «
Diese!
These
Im oberen Teil der Bezugselektrode befinden sich die Anschlüsse 11 für das Thermoelement 8 (Fig. Ib) sowie der Anschluß 9 für die Innenableitung 5. Außerdem wird dort das Referenzgas 7 an den mit Pfeilen gekennzeichneten Stellen zu- und weggeführt.In the upper part of the reference electrode are the connections 11 for the thermocouple 8 (Fig. Ib) and the Connection 9 for the inner discharge 5. In addition, the reference gas 7 is there at the points marked with arrows brought in and out.
In der Fig. Ib ist der Kontaktbereich zwischen Stab 1 und Innenabteilung 5 im Detail dargestellt. Das Referenzgas 7 strömt am unteren Ende des 4-Lochrohres 6 in das Zirkondioxid-Pulver 4 aus. Da durch dieses Referenzgas 7 innerhalb des AlgOg-Rohres 3 ein geringer Überdruck erzeugt wird, wird die Eindiffusion von Bestandteilen der Schmelze verhindert. Das Thermoelement 8 ist am unteren Ende des 4-Löchrohres nach außen in die Referenzgasatmosphäre geführt.In Fig. Ib is the contact area between rod 1 and Interior department 5 shown in detail. The reference gas 7 flows into the zirconium dioxide powder at the lower end of the 4-hole tube 6 4 off. Since a slight overpressure is generated by this reference gas 7 within the AlgOg pipe 3 prevents the inward diffusion of constituents of the melt. The thermocouple 8 is at the lower end of the 4-hole tube out into the reference gas atmosphere.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19858513976 DE8513976U1 (en) | 1985-05-11 | 1985-05-11 | Oxygen probe using a non-conductive ceramic tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19858513976 DE8513976U1 (en) | 1985-05-11 | 1985-05-11 | Oxygen probe using a non-conductive ceramic tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE8513976U1 true DE8513976U1 (en) | 1985-06-20 |
Family
ID=6780991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19858513976 Expired DE8513976U1 (en) | 1985-05-11 | 1985-05-11 | Oxygen probe using a non-conductive ceramic tube |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE8513976U1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3811865C1 (en) * | 1988-04-09 | 1989-05-24 | Schott Glaswerke, 6500 Mainz, De | Measurement device for measuring the oxygen partial pressure in aggressive liquids at high temperature |
| DE3811915A1 (en) * | 1988-04-09 | 1989-10-19 | Schott Glaswerke | Measurement device for measuring the oxygen partial pressure in aggressive liquids at high temperature |
| DE3811864A1 (en) * | 1988-04-09 | 1989-10-19 | Schott Glaswerke | Measurement device for measuring the oxygen partial pressure in aggressive liquids at high temperature |
| EP0450090A1 (en) * | 1989-10-17 | 1991-10-09 | Heraeus Electronite Co., Ltd. | Method of and device for measuring oxygen activity in slag and consumable type crucible used for said device |
| DE4138409A1 (en) * | 1991-11-22 | 1993-05-27 | Schott Glaswerke | Reference electrode for partial pressure measurements in high temperature medium - has protective ceramic sleeve enclosing solid electrolyte probe of small size with external connection head to eliminate water cooling |
-
1985
- 1985-05-11 DE DE19858513976 patent/DE8513976U1/en not_active Expired
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3811865C1 (en) * | 1988-04-09 | 1989-05-24 | Schott Glaswerke, 6500 Mainz, De | Measurement device for measuring the oxygen partial pressure in aggressive liquids at high temperature |
| DE3811915A1 (en) * | 1988-04-09 | 1989-10-19 | Schott Glaswerke | Measurement device for measuring the oxygen partial pressure in aggressive liquids at high temperature |
| DE3811864A1 (en) * | 1988-04-09 | 1989-10-19 | Schott Glaswerke | Measurement device for measuring the oxygen partial pressure in aggressive liquids at high temperature |
| EP0450090A1 (en) * | 1989-10-17 | 1991-10-09 | Heraeus Electronite Co., Ltd. | Method of and device for measuring oxygen activity in slag and consumable type crucible used for said device |
| EP0450090A4 (en) * | 1989-10-17 | 1992-06-24 | Yamari Electronite Kabushikigaisha | Method of and device for measuring oxygen activity in slag and consumable type crucible used for said device |
| US5342489A (en) * | 1989-10-17 | 1994-08-30 | Yamari Electronite Kabushikigaisha | Method of measuring oxygen activities in slag |
| DE4138409A1 (en) * | 1991-11-22 | 1993-05-27 | Schott Glaswerke | Reference electrode for partial pressure measurements in high temperature medium - has protective ceramic sleeve enclosing solid electrolyte probe of small size with external connection head to eliminate water cooling |
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